Apparatus for moving dredges.



, PATBNTBD JUNB'z, 1907. W. HASILVER A 0. A. BUNYAN. APPARATUS PoRMOVING DREDGES.

No. 85a

APPLIUATION FILED .IANA 19 o 07 z sums-SHEET 1.

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Nol 858,033.' y PMIENTED JUNE 25, V'1907.v w; H. SILVER an c. A.,BUNYAN.

I APPARATUS FOR MOVING DREDGES.

APPLIUATION FILED JAN10, 1907.

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UNITED STATES PATENT oEEIoE.

APPARATUS FOR MOVING DREDGES.

Specification of Letters Patent.

Patented June 25, 1 907.

Application filed January 10,1907. Serial No. 351,711.

To all whom, 1125 nfl/ty concern:

Be it known that we, WILLIAM H. SILVER and CHARLES A. BUNYAN, citizensof the United States, residing at Hammond, in the county of Piatt andState of Illinois, have invented certain newand useful Improvements inApparatus for Moving Dredges, &c. and we do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse same, reference being had to the accompanying drawings, and to theletters and iig ures of reference marked thereon, which form a part ofthis specification.

This invention relates to new and useful improvements in a paratus formoving dredges or other heavy loads, and consists in the provision ofmeans whereby the load is lifted and the latter, by its own weight,-

caused to move the same, and is so constructed that it will operate fromthe bottom of the dredge, making it very convenient in passing betweendeep cuts and abutments and prevents the crushing and impairing of thebanks of a ditch, which are objections to the usual dredging machines.

More specifically, theJ invention consists in the provision of a dredgemoving apparatus having a shoel swivelly connected to a yoke, the upperportion of which carries a shaft upon which a grooved sheave is mounted,and in the provision of winding drums with cables, one passing about adrum and about a traveling sheave. carried at the up er end of the yoke,and by the winding of which cable upon its drum, will cause the sheaveto travel toward the drum, and the dredge to move forward, after whichthe shoe may be returned to its `starting position through the medium ofa cable winding about the other drum and passing about a sheaveconnected to the forward end of the shoe.

Our invention consists in other details of construction and combinationsand arrangements of parts which will be hereinafter fully described andthen specifically defined in the appended claims.

We illustrate our invention in the accom panying drawings, in which:-

Figure l is a vertical longitudinal sectional view through our improveda paratus showing, in full lines, the advance position of the dredge,and, in dotted lines, the shoe in its starting position. Fig. 2 is atransverse sectional view, and Fig. 3 is a sectional view through theshoe and the rack which is swiveled thereto.

' Reference now being had to the details of the drawings by letter, Adesignates the deck of the apparatus, and B, B the fixed shoes uponwhich the standards O are mounted and which vsu port said deck. Saidshoes have their under surfaces stepped, as shown in the sectional viewof the drawings, and suitable braces O are connected to the variousstandards. Rising from the deck are the posts D having beams Dconnecting their upper ends and to the under surfaces of said beams Dare fastened the rack bars E.

F designate two beams lwhich are fastened to the posts D and with s acesintervening between the saine and the beams D.

G designates a movable shoe having a cross-piece G', thereon to whichthe lower end of the yoke H is swivelly connected. The longitudinalbeams of said yoke pass through elongated slots A formed in the deck ofthe framework, and at their upper ends is jouriialed a shaft O carryingantifriction rollers I which travel upon the upper surfaces of the beamsF and are of a diameter equal to the pace intermediate the beams D andF.

Xed to said shaft O are the pinion wheels O which are ada ted to meshwith the teeth of said rack liars, and P designates a grooved sheavewhich is also fixed to said shaft, and I is a hanger block mounted uponsaid shaft and in a slot in which said grooved sheave is mounted.

Mounted in suitable bearings in the rojecting portions D2 of said beamsD is a s aft Q with a grooved pulley Q fixed thereto and a crank shaftQ2 is fastened to the projecting end of the shaft Q whereby the same maybe rotated.

R designates a cable which has one end fixed to and adapted to wind uponthe drum Q, and said cable passes about the grooved sheave upon theshaft O a plurality of times has its end secured to said sheave and isadapted,l as the drum Q is rotated in one direction, to cause the sheaveto rotate. As the yoke H is held at an inclination and when the sheavecommences to rotate, the pinion wheels will rotate therewith and theshaft rotating while stationary and its pinion wheels bearing againstthe teeth of the rack bar, will cause the dredge frame to be movedforward, the limit of the movement being the length of the spaceintermediate the upright beams D.

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A second cable, designated by letter T, winds upon a drum T which isfixed to a shaft T2 also journaled in the projecting part D of theupright beams D, and passes over a sheave J, thence passes forward overa pulley L, and its other end is fastened to the forward end of thetraveling shoe G. When it is desired to return the shoe G to itsstarting position, shown in dotted lines in Fig. l after the dredge boathas been moved forward, the cable, which has been wound upon the drumQ', is slackened, and the shaft T2 is rotated by the handle fastened atthe end thereof and the cable T made to wind upon the drum T which,drawing upon the forward end of the shoe, will cause the latter to bedrawn forward while the dredge remains stationary. As the movable shoetravels forward, the yoke will also move forward and carrying with itthe grooved sheave at the upper end thereof. This being done, theoperation may be repeated and the dredge given an intermittent forwardmovement.

The tendency of the apparatus, as shown and described, is to raise theforward end of the apparatus, but by locking the drum T and tighteningthe cable upon the drum Q, the rear end of the apparatus may be raisedand the entire machine pivoted upon the swivel at the lower end of theyoke, turned at a small sp ace.

What we claim is l. A dredge moving apparatus, etc., comprising, incombination with a frame, a shoe, a yoke swiveled thereto, a sheavemounted upon said yoke, a winding drum mounted in suitable bearings uponuprights from the frame, a cable fixed to and winding about said drumand also winding about said sheave, horizontally disposed rack bars, pinions meshing with said rack bars, and means for returning the movableshoe for a new purchase, as set forth.

2.y A dredge moving apparatus comprising, in combination with a boathaving upright standards thereon, cross-beams connecting the same, amovable shoe, a yoke swiveled to said shoe, a shaft journaled at theupper end of said yoke, a grooved sheave fixed to said shaft,anti-friction rollers upon said shaft and mounted to travel betweenhorizontally disposed cross-beams connecting said standards, rack barsmounted upon the under surfaces of the upper of said cross-beams,pinions fixed to said shaft and meshing with the teeth of said rackbars, a winding drum, a cable thereon and adapted to wind upon saidgrooved sheave, and means for moving the sheave and rack bar to theirstarting posie tions, after the dredge boat has been moved forward, asset forth.

3. A dredge moving apparatus comprising, in combination with a boathaving upright standards thereon, crossbeams connecting the same, amovable shoe, a yoke swiveled to A said shoe, a shaft journaled at theupper end vof said yoke, a grooved sheave fixed to said shaft,anti-friction rollers upon said shaft and mounted to travel betweenhorizontally disposed cross-beams connecting said standards, rack barsmounted upon the under surfaces of the upper of said cross-beams,pinions xed to said shaft and meshing with the teeth of said rack bars,a winding drum, a cable thereon and adapted to wind upon said groovedsheave, a second winding drum, a cable winding thereon, and a sheaveover which said second cable turns and connected to said shoe, as setforth.

4. A dredge moving apparatus comprising, in combination with a boathaving upright standards thereon, cross-beams connecting the same, amovable shoe, a yoke swiveled to said shoe, a shaft journaled at theupper end of said yoke, a grooved sheave fixed to said shaft,anti-friction rollers upon said shaft and mounted to travel betweenhorizontally disposed cross-beams connecting said standards, rack barsmounted upon the under surfaces of the upper of said cross-beams,pinions xed to said shaft and meshing with the teeth of said rack bars,a winding drum, a cable thereon and adapted to wind upon said groovedsheave, grooved sheave blocks mounted underneath the deck of the boat, asecond winding drum, a cable passing about the latter and adapted towind about the groove in said movable sheave and fastened to the forwardend of said movable shoe, as set forth.

5. A dredge moving apparatus comprising, in combination with the boathaving a deck with fixed shoes having standards mounted thereon andsupporting said deck, a movable shoe intermediate the fixed shoes, ayoke swiveled to said movable shoe, the longitudinal beams of said yokepassing through elongated slots in the deck, a shaft journaled at theupper end of said yoke, standards rising from the deck, cross-beamsconnecting said standards and spaced apart, anti-frictionrollers'mounted upon said shaft and adapted to travel between saidcross-beams connecting the standards, rack bars on the under sur facesof the upper of said cross-beams, pinions fixed to said shaft andmeshing with said rack bars, a drum, a cable winding thereon and passingabout said sheave a plurality of times, a second drum, and cableconnections between the same and the forward end of the movable shoe, asset forth;

In testimony whereof we hereunto affix our signatures in the presence oftwo witnesses.

WILLIAM H. SILVER. CHARLES A. BUNYAN.

Witnesses JOHN LARsoN, JOHN KILBURN.

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